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Research on novel light emitting devices using the unique properties generated by singularity of crystal

Planned Research

Project AreaMaterials Science and Advanced Elecronics created by singularity
Project/Area Number 16H06420
Research Category

Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Hideki Hirayama  国立研究開発法人理化学研究所, 開拓研究本部, 主任研究員 (70270593)

Co-Investigator(Kenkyū-buntansha) 鎌田 憲彦  埼玉大学, 理工学研究科, 教授 (50211173)
寺嶋 亘  国立研究開発法人理化学研究所, 平山量子光素子研究室, 研究員 (30450406)
Project Period (FY) 2016-06-30 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥60,190,000 (Direct Cost: ¥46,300,000、Indirect Cost: ¥13,890,000)
Fiscal Year 2020: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Fiscal Year 2019: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Fiscal Year 2018: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Fiscal Year 2017: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
Fiscal Year 2016: ¥12,870,000 (Direct Cost: ¥9,900,000、Indirect Cost: ¥2,970,000)
Keywords特異構造結晶 / 深紫外LED / テラヘルツ量子カスケードレーザ / 結晶成長 / THz-QCL / テラヘルツQCL / THz-QCL / 深紫外LD / 量子エレクトロニクス
Outline of Final Research Achievements

We aim to realize novel light-emitting devices by utilizing the unique physical properties generated by singularity of the crystal.
AlGaN deep-UV light-emitting diodes (LEDs) were fabricated on the AlN buffer grown on the patterned substrates for the purpose of realizing high light-extraction efficiency, and we obtained single peak emission from the LED. We also fabricated deep-UV laser diode (LD) with a polarization doped p-type cladding layer, and a high current injection operation was obtained assisted by high hole concentration. We improved the performance of terahertz quantum-cascade lasers (THz-QCLs) using inter-subband transition engineering, and realized high output power operation and increasing operating temperature. The room temperature optical gain of the GaN THz-QCL was shown by analysis. A double-metal waveguide GaN-based QCL was fabricated using the Si substrate lift-off process, and the current-voltage characteristics predicted by the analysis were observed.

Academic Significance and Societal Importance of the Research Achievements

特異性結晶により得られた特異な物性の発現とそれを利用した新機能光デバイスの研究内容は、新規物性に関する物理的な理解と光デバイスエンジニアリング分野に於いて学術的な意義が大きい。深紫外・テラヘルツ領域の革新的デバイスの創出により、殺菌・ウィルス不活化、浄水、空気浄化など現在問題となっている感染症対策や福祉環境保全が促進され、また、各種透視・非破壊検査用の光源としてセキュリティ検査、医療などの応用分野に波及すると考えられ、我が国の経済発展への寄与が大きい。

Report

(6 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (322 results)

All 2021 2020 2019 2018 2017 2016 Other

All Journal Article (42 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 42 results,  Open Access: 21 results) Presentation (254 results) (of which Int'l Joint Research: 118 results,  Invited: 81 results) Book (11 results) Remarks (6 results) Patent(Industrial Property Rights) (9 results) (of which Overseas: 5 results)

  • [Journal Article] Impact of Mg level on lattice relaxation in a p-AlGaN hole source layer and attempting excimer laser annealing on p-AlGaN HSL of UVB emitters2020

    • Author(s)
      Khan M Ajmal、Bermundo Juan Paolo、Ishikawa Yasuaki、Ikenoue Hiroshi、Fujikawa Sachie、Matsuura Eriko、Kashima Yukio、Maeda Noritoshi、Jo Masafumi、Hirayama Hideki
    • Journal Title

      Nanotechnology

      Volume: 32 Issue: 5 Pages: 055702-055702

    • DOI

      10.1088/1361-6528/abbddb

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] High internal quantum efficiency and optically pumped stimulated emission in AlGaN-based UV-C multiple quantum wells2020

    • Author(s)
      Murotani Hideaki、Tanabe Ryohei、Hisanaga Keisuke、Hamada Akira、Beppu Kanta、Maeda Noritoshi、Khan M. Ajmal、Jo Masafumi、Hirayama Hideki、Yamada Yoichi
    • Journal Title

      Applied Physics Letters

      Volume: 117 Issue: 16 Pages: 162106-162106

    • DOI

      10.1063/5.0027697

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Correlation between excitons recombination dynamics and internal quantum efficiency of AlGaN-based UV-A multiple quantum wells2020

    • Author(s)
      Murotani Hideaki、Miyoshi Hiroyuki、Takeda Ryohei、Nakao Hiroki、Ajmal Khan M.、Maeda Noritoshi、Jo Masafumi、Hirayama Hideki、Yamada Yoichi
    • Journal Title

      Journal of Applied Physics

      Volume: 128 Issue: 10 Pages: 105704-105704

    • DOI

      10.1063/5.0015554

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] External Quantum Efficiency of 6.5% at 300 nm Emission and 4.7% at 310 nm Emission on Bare Wafer of AlGaN-Based UVB LEDs2020

    • Author(s)
      Khan M. Ajmal、Itokazu Yuri、Maeda Noritoshi、Jo Masafumi、Yamada Yoichi、Hirayama Hideki
    • Journal Title

      ACS Applied Electronic Materials

      Volume: 2 Issue: 7 Pages: 1892-1907

    • DOI

      10.1021/acsaelm.0c00172

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Beyond 53% internal quantum efficiency in a AlGaN quantum well at 326 nm UVA emission and single-peak operation of UVA LED2020

    • Author(s)
      Khan M. Ajmal、Takeda Ryohei、Yamada Yoichi、Maeda Noritoshi、Jo Masafumi、Hirayama Hideki
    • Journal Title

      Optics Letters

      Volume: 45 Issue: 2 Pages: 495-498

    • DOI

      10.1364/ol.376894

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Overcoming the current injection issue in the 310 nm band AlGaN UVB light-emitting diode2019

    • Author(s)
      Khan M. Ajmal、Matsuura Eriko、Kashima Yukio、Hirayama Hideki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SA Pages: SAAD01-SAAD01

    • DOI

      10.7567/1347-4065/ab460b

    • NAID

      210000157156

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Random electric field induced by interface roughness in GaN/AlGaN multiple quantum wells2019

    • Author(s)
      Joosun Yun, Dong-Pyo Han, and Hideki Hirayama
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 12 Pages: 124005-124005

    • DOI

      10.7567/1882-0786/ab548a

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Influence of Undoped‐AlGaN Final Barrier of MQWs on the Performance of Lateral‐Type UVB LEDs2019

    • Author(s)
      Ajmal Khan Muhammad、Matsuura Eriko、Kashima Yukio、Hirayama Hideki
    • Journal Title

      physica status solidi (a)

      Volume: 216 Issue: 18 Pages: 1970059-1970059

    • DOI

      10.1002/pssa.201970059

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluation of GaN/AlGaN THz quantum-cascade laser epi-layers grown on AlGaN/Si templates by MOCVD2019

    • Author(s)
      Fujikawa Sachie、Ishiguro Toshiya、Wang Ke、Terashima Wataru、Fujishiro Hiroki、Hirayama Hideki
    • Journal Title

      Journal of Crystal Growth

      Volume: 510 Pages: 47-49

    • DOI

      10.1016/j.jcrysgro.2018.12.027

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Short-period scattering-assisted terahertz quantum cascade lasers operating at high temperatures2019

    • Author(s)
      Li Wang, Tsung-Tse Lin, Ke Wang, Thomas Grange, Stefan Birner, and Hideki Hirayama
    • Journal Title

      Scientific reports

      Volume: 9 Issue: 1 Pages: 9446-9446

    • DOI

      10.1038/s41598-019-45957-8

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Parasitic transport paths in two-well scattering-assisted terahertz quantum cascade lasers2019

    • Author(s)
      Li Wang, Tsung-Tse Lin, Ke Wang, and Hideki Hirayama
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 8 Pages: 082003-082003

    • DOI

      10.7567/1882-0786/ab2b56

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nonradiative recombination centers in deep UV-wavelength AlGaN quantum wells detected by below-gap excitation light2019

    • Author(s)
      Hossain M. Ismail、Itokazu Yuri、Kuwaba Shunsuke、Kamata Norihiko、Maeda Noritoshi、Hirayama Hideki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SC Pages: SCCB37-SCCB37

    • DOI

      10.7567/1347-4065/ab1069

    • NAID

      210000156272

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Influence of the nucleation conditions on the quality of AlN layers with high-temperature annealing and regrowth processes2019

    • Author(s)
      Itokazu Yuri、Kuwaba Shunsuke、Jo Masafumi、Kamata Norihiko、Hirayama Hideki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SC Pages: SC1056-SC1056

    • DOI

      10.7567/1347-4065/ab1126

    • NAID

      210000156252

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Controlled crystal orientations of semipolar AlN grown on an m-plane sapphire by MOCVD2019

    • Author(s)
      Jo Masafumi、Itokazu Yuri、Kuwaba Shunsuke、Hirayama Hideki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SC Pages: SC1031-SC1031

    • DOI

      10.7567/1347-4065/ab0f1c

    • NAID

      210000156090

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evolution of morphology and crystalline quality of DC-sputtered AlN films with high-temperature annealing2019

    • Author(s)
      Mogami Yosuke、Motegi Shogo、Osawa Atsushi、Osaki Kazuto、Tanioka Yukitake、Maeoka Atsushi、Jo Masafumi、Maeda Noritoshi、Yaguchi Hiroyuki、Hirayama Hideki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 58 Issue: SC Pages: SC1029-SC1029

    • DOI

      10.7567/1347-4065/ab1066

    • NAID

      210000156092

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] AlGaN深紫外LDの実現へ向けた最近の進展2019

    • Author(s)
      平山秀樹、前田哲利、M. Ajmal Khan、只友一行、岡田成仁、山田陽一
    • Journal Title

      レーザー研究

      Volume: 47 Pages: 196-203

    • NAID

      130008074017

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Milliwatt power UV-A LEDs developed by using n-AlGaN superlattice buffer layers grown on AlN templates2019

    • Author(s)
      Matsumoto Takuma、Ajmal Khan M、Maeda Noritoshi、Fujikawa Sachie、Kamata Norihiko、Hirayama Hideki
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 52 Issue: 11 Pages: 115102-115102

    • DOI

      10.1088/1361-6463/aaf60a

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 13 mW operation of a 295?310 nm AlGaN UV-B LED with a p-AlGaN transparent contact layer for real world applications2019

    • Author(s)
      Khan M. Ajmal、Maeda Noritoshi、Jo Masafumi、Akamatsu Yuki、Tanabe Ryohei、Yamada Yoichi、Hirayama Hideki
    • Journal Title

      Journal of Materials Chemistry C

      Volume: 7 Issue: 1 Pages: 143-152

    • DOI

      10.1039/c8tc03825b

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reflectance of a reflective photonic crystal p-contact layer for improving the light-extraction efficiency of AlGaN-based deep-ultraviolet light-emitting diodes2018

    • Author(s)
      Yun Joosun、Kashima Yukio、Hirayama Hideki
    • Journal Title

      AIP Advances

      Volume: 8 Issue: 12 Pages: 125126-125126

    • DOI

      10.1063/1.5062603

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Impact of thermal treatment on the growth of semipolar AlN on m-plane sapphire2018

    • Author(s)
      Jo Masafumi、Morishita Naoki、Okada Narihito、Itokazu Yuri、Kamata Norihiko、Tadatomo Kazuyuki、Hirayama Hideki
    • Journal Title

      AIP Advances

      Volume: 8 Issue: 10 Pages: 105312-105312

    • DOI

      10.1063/1.5052294

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Optimization of terahertz quantum cascade lasers by suppressing carrier leakage channel via high-energy state2018

    • Author(s)
      Lin Tsung-Tse、Wang Li、Wang Ke、Grange Thomas、Hirayama Hideki
    • Journal Title

      Applied Physics Express

      Volume: 11 Issue: 11 Pages: 112702-112702

    • DOI

      10.7567/apex.11.112702

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] High output power THz quantum cascade lasers and their temperature dependent performance2018

    • Author(s)
      T. T. Lin, K. Wang, L. Wang, and H. Hirayama
    • Journal Title

      Journal of Infrared and Millimeter Waves

      Volume: 37 Pages: 513-522

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Broadening mechanisms and self-consistent gain calculations for GaN quantum cascade laser structures2018

    • Author(s)
      Wang Ke、Grange Thomas、Lin Tsung-Tse、Wang Li、Jehn Zoltan、Birner Stefan、Yun Joosun、Terashima Wataru、Hirayama Hideki
    • Journal Title

      Applied Physics Letters

      Volume: 113 Issue: 6 Pages: 061109-061109

    • DOI

      10.1063/1.5029520

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 殺菌用・深紫外LEDの進展2018

    • Author(s)
      平山秀樹
    • Journal Title

      ファインセラミックスレポート

      Volume: 36 Pages: 118-121

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 殺菌用・深紫外LEDの進展2018

    • Author(s)
      平山秀樹
    • Journal Title

      月刊バイオインダストリー

      Volume: 35 Pages: 63-70

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Controlling loss of waveguides for potential GaN terahertz quantum cascade lasers by tuning the plasma frequency of doped layers2018

    • Author(s)
      Wang Ke、Lin Tsung-Tse、Wang Li、Terashima Wataru、Hirayama Hideki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 8 Pages: 081001-081001

    • DOI

      10.7567/jjap.57.081001

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Improving the Efficiency of AlGaN Deep-UV LEDs by Using Highly Reflective Ni/Al p-Type Electrodes2018

    • Author(s)
      Maeda Noritoshi、Jo Masafumi、Hirayama Hideki
    • Journal Title

      physica status solidi (a)

      Volume: 215 Issue: 8 Pages: 1700435-1700435

    • DOI

      10.1002/pssa.201700435

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Improving the Light-Extraction Efficiency of AlGaN DUV-LEDs by Using a Superlattice Hole Spreading Layer and an Al Reflector2018

    • Author(s)
      Maeda Noritoshi、Jo Masafumi、Hirayama Hideki
    • Journal Title

      physica status solidi (a)

      Volume: 215 Issue: 8 Pages: 1700436-1700436

    • DOI

      10.1002/pssa.201700436

    • Related Report
      2018 Annual Research Report 2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Enhancing the light-extraction efficiency of AlGaN deep-ultraviolet light-emitting diodes using highly reflective Ni/Mg and Rh as p-type electrodes2018

    • Author(s)
      Maeda Noritoshi、Yun Joosun、Jo Masafumi、Hirayama Hideki
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 4S Pages: 04FH08-04FH08

    • DOI

      10.7567/jjap.57.04fh08

    • NAID

      210000148946

    • Related Report
      2018 Annual Research Report 2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of Ga Supply on the Growth of (11-22) AlN on m-Plane (10-10) Sapphire Substrates2018

    • Author(s)
      Jo Masafumi、Hirayama Hideki
    • Journal Title

      physica status solidi (b)

      Volume: 255 Issue: 5 Pages: 1700418-1700418

    • DOI

      10.1002/pssb.201700418

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High external quantum efficiency (10%) AlGaN-based deep-ultraviolet light-emitting diodes achieved by using highly reflective photonic crystal on p-AlGaN contact layer2017

    • Author(s)
      Kashima Yukio、Maeda Noritoshi、Matsuura Eriko、Jo Masafumi、Iwai Takeshi、Morita Toshiro、Kokubo Mitsunori、Tashiro Takaharu、Kamimura Ryuichiro、Osada Yamato、Takagi Hideki、Hirayama Hideki
    • Journal Title

      Applied Physics Express

      Volume: 11 Issue: 1 Pages: 012101-012101

    • DOI

      10.7567/apex.11.012101

    • NAID

      210000136062

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Variable Barrier Height AlGaAs/GaAs Quantum Cascade Laser Operating at 3.7?THz2017

    • Author(s)
      Lin Tsung-Tse、Hirayama Hideki
    • Journal Title

      physica status solidi (a)

      Volume: 215 Issue: 8 Pages: 1700424-1700424

    • DOI

      10.1002/pssa.201700424

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Growth and Fabrication of High External Quantum Efficiency AlGaN-Based Deep Ultraviolet Light-Emitting Diode Grown on Pattern Si Substrate2017

    • Author(s)
      Tran Binh Tinh、Hirayama Hideki
    • Journal Title

      Scientific Reports

      Volume: 7 Issue: 1 Pages: 12176-12176

    • DOI

      10.1038/s41598-017-11757-1

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Design for Stable Lasing of an Indirect Injection THz Quantum Cascade Laser Operating at Less Than 2 THz2017

    • Author(s)
      T. T. Lin and H. Hirayama
    • Journal Title

      International Journal of Materials Science and Applications

      Volume: 6 Issue: 5 Pages: 230-230

    • DOI

      10.11648/j.ijmsa.20170605.11

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] AlGaN-Based Deep-Ultraviolet Light-Emitting Diodes2017

    • Author(s)
      Hirayama Hideki、Kamata Norihiko、Tsubaki Kenji
    • Journal Title

      III-Nitride Based Light Emitting Diodes and Applications

      Volume: 133 Pages: 267-299

    • DOI

      10.1007/978-981-10-3755-9_10

    • ISBN
      9789811037542, 9789811037559
    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Growth of High-Quality AlN on Sapphire and Development of AlGaN-Based Deep-Ultraviolet Light-Emitting Diodes2017

    • Author(s)
      Hirayama H.
    • Journal Title

      Semiconductors and Semimetals

      Volume: 96 Pages: 85-120

    • DOI

      10.1016/bs.semsem.2016.11.002

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural and electrical properties of semipolar (11-22) AlGaN grown on m -plane (1-100) sapphire substrates2017

    • Author(s)
      Masafumi Jo, Issei Oshima, Takuma Matsumoto, Noritoshi Maeda, Norihiko Kamata and Hideki Hirayama
    • Journal Title

      Phys. Status Solidi (c)

      Volume: - Issue: 8

    • DOI

      10.1002/pssc.201600248

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Deep-ultraviolet light-emitting diodes with external quantum efficiency higher than 20% at 275 nm achieved by improving light-extraction efficiency2017

    • Author(s)
      T. Takano, T. Mino, J. Sakai, N. Noguchi, K. Tsubaki and H. Hirayama
    • Journal Title

      Applied Physics Express

      Volume: 10 Issue: 3 Pages: 031002-031002

    • DOI

      10.7567/apex.10.031002

    • NAID

      210000135778

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Investigation of the light-extraction efficiency in 280 nm AlGaN-based light-emitting diodes having a highly transparent p-AlGaN contact layer2017

    • Author(s)
      J. Yun and H. Hirayama
    • Journal Title

      J. Appl. Phys.

      Volume: 121 Issue: 1

    • DOI

      10.1063/1.4973493

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High-Quality AlN Template Grown on a Patterned Si (111) Substrate2016

    • Author(s)
      B. T. Tran, H. Hirayama, M. Jo, N. Maeda, D. Inoue, T. Kikitsu
    • Journal Title

      Journal of Crystal Growth

      Volume: - Pages: 225-229

    • DOI

      10.1016/j.jcrysgro.2016.12.100

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Performance improvement of AlN crystal quanlity grown on patterned Si (111) substrate for deep UV LED applications2016

    • Author(s)
      B. T. Tran, N. Maeda, N. Jo, D. Inoue, T. Kikitsu and H. Hirayama
    • Journal Title

      Scientific Report

      Volume: 6 Issue: 1 Pages: 35681-35681

    • DOI

      10.1038/srep35681

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] テラヘルツ量子カスケードレーザーの進展2016

    • Author(s)
      平山秀樹
    • Journal Title

      レーザー研究

      Volume: 44 Pages: 520-526

    • NAID

      130007957296

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] High-power AlGaN UVC LEDs using PhC reflector p-contact layers2021

    • Author(s)
      H. Hirayama, Y. Kashima, E. Matsuura, N. Maeda, M. Jo, Y. Iwaisako, T. Iwai, M. Kokubo, T. Tashiro, H. Furuta, R. Kamimura, Y. Osada, H. Takagi, Y. Kurashima and T. Nagano
    • Organizer
      SPIE Photonic West
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Progress on high-power UVC LEDs by increasing light-extraction efficiency2021

    • Author(s)
      H. Hirayama, Y. Kashima, E. Matsuura, N. Maeda and M. Jo
    • Organizer
      SPIE Photonic West
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 深紫外LEDとTHz-QCLの最近の進展2021

    • Author(s)
      平山秀樹
    • Organizer
      第4回固体レーザーの高速探索と機能開発に向けたレーザー材料研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] GaAs及びGaN系テラヘルツ量子カスケードレーザの進展2021

    • Author(s)
      平山秀樹、林宗澤、王利、王科、陳明曦
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Recent progress on GaAs and GaN-based terahertz quantum-cascade lasers2021

    • Author(s)
      H. Hirayama, T. Lin, L. Wang, M. Chen and K. Wang
    • Organizer
      The 8th Asian Conference on Crystal Growth and Crystal Technology (CGCT-8)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design and MBE growth of GaN quantum cascade lasers for THz (25-60μm) and IR (1-3μm) spectrum range2021

    • Author(s)
      L. Wang, T. Lin, K. Wang, M. Chen and H. Hirayama
    • Organizer
      The 8th Asian Conference on Crystal Growth and Crystal Technology (CGCT-8)
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Recent progress on GaN and GaAs-based terahertz quantum-cascade lasers2021

    • Author(s)
      H. Hirayama, T. Lin, L. Wang, M. Chen and K. Wang
    • Organizer
      Virtual Workshop on Material Science and Advanced Electronics Created by Singularity
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Enhancing the Current Density of AlGaN-Based UVB Laser Diode by Introducing an Al-graded Mg-doped p-AlGaN Hole Source Layer2021

    • Author(s)
      M. Ajmal Khan, N. Maeda, M. Jo, and H. Hirayama
    • Organizer
      ISPlasma 2021/IC-PLANTS 2021
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pure AlGaN UVB LEDs on AlN template: Achieving 9.6% Efficiency at 304nm Emission by Exceeding the Limit of Hole Injection and Light Reflectance2021

    • Author(s)
      M. Ajmal Khan, N. Maeda, M. Jo, Y. Yamada, and H. Hirayama
    • Organizer
      2021 IUVA ASIA WORKSHOP
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 高出力・未踏波長テラヘルツ量子カスケードレーザーの進展と展望2021

    • Author(s)
      平山秀樹、林宗澤、王利、王科、陳明曦
    • Organizer
      理研シンポジウム第8 回「光量子工学研究」
    • Related Report
      2020 Annual Research Report
  • [Presentation] AlGaN系深紫外LEDの進展と応用展開2020

    • Author(s)
      平山秀樹
    • Organizer
      表面・真空学会若手研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 産業化を目指した深紫外LED高効率化の検討2020

    • Author(s)
      平山秀樹
    • Organizer
      応用電子物性分科会研究例会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 殺菌用深紫外LEDの進展と展望2020

    • Author(s)
      平山秀樹
    • Organizer
      UV光源応用実証研究会、第3回会員限定研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] AlGaN深紫外LEDの進展と展望2020

    • Author(s)
      平山秀樹
    • Organizer
      日本学術振興会、結晶成長の科学と技術第161委員会、第114回研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] The Influence of Al-Graded undoped-AlGaN Cladding Layer’s Thickness on the Operating Voltages as well as on Injection Current of Ultraviolet-B Laser Diode2020

    • Author(s)
      M. Ajmal Khan, N. Maeda, and H. Hirayama
    • Organizer
      Optics Virtual 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Highly Efficient AlGaN UVB LEDs using Al-Graded Mg-doped p-type Multi-Quantum-Barrier Electron Blocking Layer (Grad p-MQB-EBL)2020

    • Author(s)
      M. Ajmal Khan, N. Maeda, M. Jo, Y. Yamada, and H. Hirayama
    • Organizer
      LEDIA 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Assisted-scattering two-wall teraherz quantum cascade lasers2020

    • Author(s)
      L. Wang, T. T. Lin, M. Chen and H. Hirayama
    • Organizer
      テラヘルツ科学の最先端VII
    • Related Report
      2020 Annual Research Report
  • [Presentation] AlGaN 系 UV-A 多重量子井戸構造における内部量子効率と励起子の輻射再結合ダイナミクスの励起強度依存性2020

    • Author(s)
      室谷英彰、三好博之、武田椋平、中尾拓希、倉井聡、M. Ajmal Khan、前田哲利、定昌史、平山秀樹、山田陽一
    • Organizer
      第81回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] LEE Enhancement in AlGaN UVC LED using Photonic Crystal Reflector Fabricated on p-GaN Contact Layer2020

    • Author(s)
      H. Hirayama, Y. Kashima, Y. Watanabe, T. Shibata, N. Maeda, M. Jo, E. Matsuura, T. Iwai, M. Kokubo, T. Tashiro, H. Furuta, R. Kamimura, Y. Osada, H. Takagi, Y. Kurashima, Y. Iwaisako and T. Nagano
    • Organizer
      SPIE Photonic West
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Progress of AlGaN UVC LEDs by improving light extraction efficiency2020

    • Author(s)
      M. Jo, N, Maeda and H. Hirayama
    • Organizer
      SPIE Photonic West
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] High performances of AlGaN-based UVC and UVB LEDs with relaxed buffer layer as well as using p-type graded multi-quantum barrier electron blocking layer2020

    • Author(s)
      M. A. Khan, N. Maeda, M. Jo, Y. Kashima and H. Hirayama
    • Organizer
      SPIE Photonic West
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] GaAs系およびGaN系テラヘルツ量子カスケードレーザーの進展2020

    • Author(s)
      平山秀樹、林宗澤、王科、王利
    • Organizer
      レーザー学会学術講演会第40回年次大会講演会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Recent progress in GaAs THz-QCLs and towards realizing GAN based QCLs2020

    • Author(s)
      K. Wang, T. T. Lin, L. Wang and H. Hirayama
    • Organizer
      SPIE Photonic West
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] AlGaN UVB LEDs at 310nm emission with high efficiency and light power using partially relaxed n-AlGaN buffer layer2020

    • Author(s)
      M. A. Khan, N. Maeda, M. Jo, E. Matsuura, Y. Kashima, Y. Yamada, H. Hirayama
    • Organizer
      ISPlasma2020/IC-PLANTS2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The improving resolution for dislocation analysis in GaN by three-photon microscopy2020

    • Author(s)
      E. Hase, T. Yasui, H. Hirayama and K. Nagamatsu
    • Organizer
      SPIE Photonics West
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] AlGaN系多重量子井戸構造における励起子レート方程式モデルによる効率Droop現象の解析2020

    • Author(s)
      室谷英彰,三好博之,武田椋平,中生拓希,倉井聡,M. A. Khan,前田哲利,定昌史,平山秀樹,山田陽一
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] AlGaN系多重量子井戸構造における励起子の輻射・非輻射再結合レートの励起強度依存性2020

    • Author(s)
      三好博之,武田椋平,中生拓希,倉井聡,室谷英彰,M. A. Khan,前田哲利,定昌史,平山秀樹,山田陽一
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ELO-AlNテンプレートの作製とMQWの評価2020

    • Author(s)
      斉藤貴大,金輝俊,岡田成仁,前田哲利,定昌史,平山秀樹,只友一行
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 電流注入と光励起を用いたUV-LED内の欠陥準位の検出2020

    • Author(s)
      白井草汰,千代田夏樹,鎌田憲彦,糸数雄吏,山初駿太,平山秀樹
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Challenge and opportunity for mass production of UVC LED by MOVPE on high temperature annealed AlN template2019

    • Author(s)
      K. Matsumoto, Y. Tomita, A. Mishima, Y. Yamaoka, S. Koseki, Y. Yano, H. Miyake and H. Hirayama
    • Organizer
      Material Research Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Problems and latest achievements in AlGaN-based deep-UV LEDs2019

    • Author(s)
      H. Hirayama
    • Organizer
      International Workshop on Ultraviolet Materials and Devices (IWUMD4)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress of high-efficiency AlGaN deep-UV LEDs2019

    • Author(s)
      H. Hirayama, N. Maeda and M. Jo
    • Organizer
      SPIE Optics + Photonics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Simultaneous improvements in EQE and WPE of AlGaN UV-C LEDs with Ni:AlN/Al Ohmic reflectors2019

    • Author(s)
      T. G. Kim, T. H. Lee, H. Hirayama, T. H. Park, K. R. Son
    • Organizer
      SPIE Optics + Photonics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress and future prospects of AlGaN deep-UV LEDs2019

    • Author(s)
      H. Hirayama
    • Organizer
      48th International School & Conference on the Physics of Semiconductors (Jaszowiec 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] LEE enhancement in AlGaN UVC LED using photonic crystal reflector2019

    • Author(s)
      H. Hirayama, Y. Kashima, Y. Watanabe, T. Shibata, N. Maeda, M. Jo, E. Matsuura, T. Iwai, M. Kokubo, T. Tashiro, K. Furuta, R. Kamimura, Y. Osada, H. Takagi, Y. Kurashima, Y. Iwaisako and T. Nagano
    • Organizer
      13th International Conference on Nitride Semiconductors (ICNS-13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] AlGaN系深紫外LEDの最近の進展2019

    • Author(s)
      平山秀樹
    • Organizer
      徳島大学ポストLEDフォトニクス研究所 開所記念式典
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 深紫外LEDの開発最前線2019

    • Author(s)
      定昌史,平山秀樹
    • Organizer
      モノづくりフェア2019
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Recent progress and future of GaN and GaAs-based THz-QCL2019

    • Author(s)
      K. Wang, L. Wang, T. T. Lin, K. Fukuda and H. Hirayama
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 深紫外LEDの国内外の最新技術と今後の展望2019

    • Author(s)
      平山秀樹
    • Organizer
      特許庁技術研修セミナー
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 殺菌用紫外LEDの開発と今後の展望2019

    • Author(s)
      平山秀樹
    • Organizer
      OPIE’19紫外線応用技術セミナー
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Simulation and growth of GaN/AlGaN based terahertz quantum cascade structures2019

    • Author(s)
      K. Wang, L. Wang, T. T. Lin, K. Fukuda, R. Zhang, and H. Hirayama
    • Organizer
      The 9th Asia-Pacific Workshop on Widegap Semiconductors (APWS2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Radiative and nonradiative recombination rates of excitons and their effects on internal quantum efficiency of AlGaN-based UV-B MQWs2019

    • Author(s)
      H. Murotani, H. Miyoshi, R. Takeda, M. A. Khan, N. Maeda, M. Jo, H. Hirayama, and Y. Yamada
    • Organizer
      The 9th Asia-Pacific Workshop on Widegap Semiconductors (APWS2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 42mW light power from AlGaN-based 302nm-band UVB LEDs: a way forward for UVB LDs2019

    • Author(s)
      M. A. Khan, N. Maeda, M. Jo, S. Fujikawa, Y. Yamada, and H. Hirayama
    • Organizer
      The 9th Asia-Pacific Workshop on Widegap Semiconductors (APWS2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Optimization of p-cladding layer for improvement of deep ultraviolet light emitting diode performance2019

    • Author(s)
      Y. Tomita, A. Mishima, Y. Yamaoka, T. Arimura, S. Koseki, Y. Yano, K. Matsumoto, and H. Hirayama
    • Organizer
      The 9th Asia-Pacific Workshop on Widegap Semiconductors (APWS2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of AlGaN/AlN interface structure and annealing effect for control of strain re- laxation2019

    • Author(s)
      Y. Itokazu, S. Kuwaba, M. Jo, N. Kamata, and H. Hirayama
    • Organizer
      The 9th Asia-Pacific Workshop on Widegap Semiconductors (APWS2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fabrication of UVC AlGaN LEDs on DC-sputtered AlN templates with high-temperature annealing2019

    • Author(s)
      Y. Mogami, A. Osawa, K. Osaki, Y. Tanioka, A. Maeoka, Y. Itokazu, S. Kuwaba, M. Jo, N. Maeda, H. Yaguchi, and H. Hirayama
    • Organizer
      The 9th Asia-Pacific Workshop on Widegap Semiconductors (APWS2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nonradiative recombination centers in UVB AlGaN quantum well and their temperature dependence revealed by below-gap excitation light2019

    • Author(s)
      M. I. Hossain, Y. Itokazu, S. Kuwaba, N. Kamata, N. Maeda, and H. Hirayama
    • Organizer
      The 9th Asia-Pacific Workshop on Widegap Semiconductors (APWS2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of dipole scattering to level broadening and carrier transport in AlGaN-based superlattice structures2019

    • Author(s)
      J. Yun and H. Hirayama
    • Organizer
      The 9th Asia-Pacific Workshop on Widegap Semiconductors (APWS2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Level broadening by dipole scattering in AlGaN/ AlGaN superlattice structures2019

    • Author(s)
      J. Yun and H. Hirayama
    • Organizer
      Infrared Terahertz Quantum Workshop (ITQW 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental and theoretical study of piezoelectric polarization in GaN/AlGaN terahertz quantum cascade lasers2019

    • Author(s)
      L. Wang, T. T. Lin, K. Wang, T. Grange and H. Hirayama
    • Organizer
      Infrared Terahertz Quantum Workshop (ITQW 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Achievement of internal quantum efficiency up to 53% at 326nm-UVA emission from AlGaN QWs with engineering of highly relaxed buffer layer2019

    • Author(s)
      M.A. Khan, R. Takeda, H. Miyoshi, Y. Yamada, S. Fujikawa, N. Maeda, M. Jo and H. Hirayama
    • Organizer
      4th International Workshop on Ultraviolet Materials and Devices (IWUMD4)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] MBE grown p-type AlGaN and deep ultraviolet light emitting diodes2019

    • Author(s)
      K. Wang, N. Maeda, M. A. Khan, Z. Li, Y. Wu, T. Tao, B. Liu, R. Zhang and H. Hirayama
    • Organizer
      4th International Workshop on Ultraviolet Materials and Devices (IWUMD4)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Optimization of THz QCLs by suppressing A leakage current via high energy states2019

    • Author(s)
      T. T. Ln, K. Wang, L. Wang and H. Hirayama
    • Organizer
      44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Realization of high light output power in AlGaN-based UVB LED at 310±2nm emission using highly relaxed (50%) n-AlGaN electron injection layer2019

    • Author(s)
      M. A. Khan, N. Maeda, M. Jo, S. Fujikawa, E. Matsuura, Y. Kashima, Y. Yamada and H. Hirayama
    • Organizer
      13th International Conference on Nitride Semiconductors (ICNS-13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Current status and future directions of high power AlGaN-based UVB LEDs with emission of 280nm-320nm2019

    • Author(s)
      M. A. Khan and H. Hirayama
    • Organizer
      13th International Conference on Nitride Semiconductors (ICNS-13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Optically pumped stimulated emission from AlGaN-based UV-C multiple quantum wells with high internal quantum efficiency of 16 % at 750 K2019

    • Author(s)
      H. Murotani, K. Hisanaga, R. Tanabe, A. Hamada, N. Maeda, M. Jo, H. Hirayama and Y. Yamada
    • Organizer
      13th International Conference on Nitride Semiconductors (ICNS-13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Role of exciton recombination processes on internal quantum efficiency in AlGaN-based UV-B multiple quantum wells2019

    • Author(s)
      H. Murotani, H. Miyoshi, R. Takeda, M. A. Khan, N. Maeda, M. Jo, H. Hirayama and Y. Yamada
    • Organizer
      13th International Conference on Nitride Semiconductors (ICNS-13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Epitaxial lateral overgrowth of AlN with partially non-dislocation-region on vicinal AlN template2019

    • Author(s)
      N. Okada, F. Kim, T. Saito, S. Fujikawa, N. Maeda, H. Hirayama and K. Tadatomo
    • Organizer
      13th International Conference on Nitride Semiconductors (ICNS-13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Improved simulation of MOCVD growth of AlN by using data assimilation2019

    • Author(s)
      M. Jo, Y. Itokazu, S. Kuwaba and H. Hirayama
    • Organizer
      13th International Conference on Nitride Semiconductors (ICNS-13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Optimizing AlGaN-based UVB LEDs using experimental device data in the Nextnano software2019

    • Author(s)
      M. C. D. Figueira, A. Trellakis, S. Birner, M. A. Khan and H, Hirayama
    • Organizer
      13th International Conference on Nitride Semiconductors (ICNS-13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] AlGaN UVC LEDs directly grown on DC-sputtered and high temperature annealed AlN templates2019

    • Author(s)
      S. Kuwaba, Y. Itokazu, S. Motegi, Y. Mogami, A. Osawa, K. Osaki, Y. Tamioka, A. Maeoka, M. Jo, N. Kamata and H. Hirayama
    • Organizer
      13th International Conference on Nitride Semiconductors (ICNS-13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Enhanced strain relaxation in AlGaN layers grown on sputter-based AlN templates2019

    • Author(s)
      Y. Mogami, S. Motegi, A. Osawa, K. Osaki, Y. Tomioka, A. Maeoka, Y. Itokazu, S. Kuwaba, M. Jo, N. Maeda, H. Yagichi and H. Hirayama
    • Organizer
      13th International Conference on Nitride Semiconductors (ICNS-13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of the strain relaxation on the optical property of AlGaN quantum wells2019

    • Author(s)
      Y. Itokazu, Y. Mogami, S. Kuwaba, S. Motegi, A. Osawa, K. Osaki, Y. Tamioka, M. Jo, N. Kamata and H. Hirayama
    • Organizer
      13th International Conference on Nitride Semiconductors (ICNS-13)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Current challenges and future direction for AlGaN based UV-B LEDs grown by LP-MOVPE2019

    • Author(s)
      M. A. Khan, N. Maeda, M. Jo, Y. Yamada and H. Hirayama
    • Organizer
      European Materials Research Society Spring Meeting 2019 (E-MRS)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Progress on high output power THz QCLs developed by reducing horizontal parasitic current leakage2019

    • Author(s)
      T. T. Lin, K. Wang, L. Wang and H. Hirayama
    • Organizer
      電子情報通信学会 電子デバイス研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Near- and far-infrared quantum cascasde lasers based on GaAs and GaN materials: devices design and MBE growth2019

    • Author(s)
      L. Wang, T. T. Lin, K. Wang and H. Hirayama
    • Organizer
      電子情報通信学会 電子デバイス研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Recent progress of high output power THz QCLs by reducing parasitic leakage current2019

    • Author(s)
      T. T. Lin, L. Wang, K. Wang and H. Hirayama
    • Organizer
      理研シンポジウム第7 回「光量子工学研究」
    • Related Report
      2019 Annual Research Report
  • [Presentation] Gain predicted by NEGF method in terahertz quantum cascade lasers based on different semiconductors2019

    • Author(s)
      L. Wang, T. T. Lin, K. Wang and H. Hirayama
    • Organizer
      理研シンポジウム第7 回「光量子工学研究」
    • Related Report
      2019 Annual Research Report
  • [Presentation] Experimental and theoretical study of piezoelectric polarization in GaN/AlGaN terahertz quantum cascade lasers2019

    • Author(s)
      L. Wang, K. Wang, T. T. Lin and H. Hirayama,
    • Organizer
      理研シンポジウム第7 回「光量子工学研究」
    • Related Report
      2019 Annual Research Report
  • [Presentation] GaN/AlGaN based THz-QCL taking into account an interface roughness scattering2019

    • Author(s)
      J. Yun and H. Hirayama
    • Organizer
      理研シンポジウム第7 回「光量子工学研究」
    • Related Report
      2019 Annual Research Report
  • [Presentation] Progress on high-efficiency AlGaN-based UVB-LEDs for both medical and agricultural applications2019

    • Author(s)
      M. A. Khan, N. Maeda, M. Jo, Y. Yamada and H. Hirayama
    • Organizer
      理研シンポジウム第7 回「光量子工学研究」
    • Related Report
      2019 Annual Research Report
  • [Presentation] DCスパッタAlNテンプレートを用いたUVCLEDの進展2019

    • Author(s)
      最上耀介,大澤篤史,尾崎一人,谷岡千丈,前岡淳史,糸数雄吏,定昌史,前田哲利,矢口裕之,平山秀樹
    • Organizer
      電子情報通信学会 レーザ・エレクトロニクス研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Recent progression in strained GaN/AlGaN THz-QCLs, growth and fabrication2019

    • Author(s)
      L. Wang, T. T. Lin and H. Hirayama
    • Organizer
      東北大学&理研第1回連携ワークショップ
    • Related Report
      2019 Annual Research Report
  • [Presentation] 0.45watt power GaAs-based THz QCL developed by reducing horizontal current leakage utilizing variable Al1-xGaxAs barriers-wells height structure2019

    • Author(s)
      T. T. Lin, L. Wang and H. Hirayama
    • Organizer
      東北大学&理研第1回連携ワークショップ
    • Related Report
      2019 Annual Research Report
  • [Presentation] 電子ブロック層の最適化による250nm AlGaN UVC-LEDの出力改善2019

    • Author(s)
      中村励志,藤川紗千恵,前田哲利,遠藤聡,藤代博記,平山秀樹
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 微傾斜サファイア基板上AlNの選択横方向成長2019

    • Author(s)
      斉藤貴大,中村亮太,藤川紗千恵,金輝俊,前田哲利,岡田成仁,平山秀樹,只友一行
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 0.44 watt power GaAs/AlGaAs THz QCL developed by reducing horizontal current leakage2019

    • Author(s)
      T. T. Lin, L. Wang and H. Hirayama
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] AlGaN系多重量子井戸構造における励起子レート方程式モデルによる効率曲線の解析(2)2019

    • Author(s)
      室谷英彰,三好博之,武田椋平,中生拓希,倉井聡,M. A. Khan,前田哲利,定昌史,平山秀樹,山田陽一
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] AlGaN量子井戸構造における深紫外誘導放出の温度依存性2019

    • Author(s)
      田邉凌平,久永桂典,濱田晟,別府寛太,倉井聡,室谷英彰,前田哲利,定昌史,平山秀樹,山田陽一
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] AlGaN 系多重量子井戸構造における励起子レート方程式モデルによる効率曲線の解析2019

    • Author(s)
      三好博之,武田椋平,中生拓希,倉井聡,室谷英彰,M. A. Khan,前田哲利,定昌史,平山秀樹,山田陽一
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] The influence of both Mg-concentration and excimer laser annealing (ELA) on p-AlGaN cladding layer for the application of AlGaN-based UVB Laser Diodes2019

    • Author(s)
      M. A. Khan, J. P. Bermudo, Y. Ishikawa, H. Ikenoue, S. Fujikawa, N. Maeda, M. Jo and H. Hirayama
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] DCスパッタAlNを用いたAlGaN層格子緩和の促進2019

    • Author(s)
      最上耀介,大澤篤史,尾崎一人,谷岡千丈,前岡淳史,糸数雄吏,桑葉俊輔,定昌史,前田哲利,矢口裕之,平山秀樹
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] DCスパッタAlNテンプレート上UVC AlGaN LEDの作製と評価2019

    • Author(s)
      最上耀介,大澤篤史,尾崎一人,谷岡千丈,前岡淳史,糸数雄吏,桑葉俊輔,定昌史,前田哲利,矢口裕之,平山秀樹
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] データ同化を用いたAlN成長シミュレーションの高精度化2019

    • Author(s)
      定昌史,糸数雄吏,桑葉俊輔,平山秀樹
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] pクラッド層の最適化によるAlGaN系深紫外LEDの性能向上2019

    • Author(s)
      富田優志,三嶋晃,山岡優哉,有村忠信,小関修一,矢野良樹,松本功,平山秀樹
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] AlGaN歪制御に向けたAlGaN/AlN界面構造とアニール効果の検討2019

    • Author(s)
      糸数雄吏,桑葉俊輔,定昌史,鎌田憲彦,平山秀樹
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 特異構造の特性を生かした新機能発光デバイスの研究2019

    • Author(s)
      平山秀樹
    • Organizer
      新学術領域研究第4回領域全体会議
    • Related Report
      2019 Annual Research Report
  • [Presentation] LEE enhancement in AlGaN UVC LED using photonic crystal reflector fabricated on p-GaN contact layer2019

    • Author(s)
      H. Hirayama, Y. Kashima, Y. Watanabe, T. Shibata, N. Maeda, M. Jo, E. Matsuura, T. Iwai, M. Kokubo, T. Tashiro, H. Furuta, R. Kamimura, Y. Osada, H. Takagi, Y. Kurashima, Y. Iwaisako and T. Nagano
    • Organizer
      SPIE Photonic West
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] AlGaN系深紫外LEDの最近の進展と今後の展望2019

    • Author(s)
      平山秀樹
    • Organizer
      日本金属学会2019年春季(164回)講演大会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Al系窒化物結晶ヘテロ成長技術とそれを用いた深紫外線LEDの開発2019

    • Author(s)
      平山秀樹
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Improved current injection in AlGaN-based 310 nm-UVB LED for real world applications2019

    • Author(s)
      M. A. Khan, N. Maeda, M. Jo, Y. Yamada and H. Hirayama
    • Organizer
      ISPlasma2019/IC-PLANTS2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] DCスパッタAlNテンプレートを用いたAlGaN深紫外LEDの作製2019

    • Author(s)
      最上耀介,茂手木省吾,大澤篤史,尾崎一人,谷岡千丈,前岡淳史,定昌史,前田哲利,矢口裕之,平山秀樹
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Effect of 4μm-thick buffer as well as 50% relaxed n-AlGaN electron Injection layer on the performance of 308nm UV-B LED2019

    • Author(s)
      M. A. Khan, N. Maeda, M. Jo, Y. Yamada, H. Hirayama
    • Organizer
      第66回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Recent progress of AlGaN deep-UV LEDs2018

    • Author(s)
      H. Hirayama and M. Jo
    • Organizer
      International Workshop on UV Materials and Devices 2018 (IWUMD2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Optimization of terahertz quantum cascade lasers by suppressing a carrier leakage channel via a high energy state2018

    • Author(s)
      T. T. Lin, K. Wang, L. Wang and H. Hirayama
    • Organizer
      International Conference on Photonics Research (ICPR2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Resent progress of THz-QCLs2018

    • Author(s)
      H. Hirayama
    • Organizer
      International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress of AlGaN deep-UV LEDs by increasing light-extraction efficiency2018

    • Author(s)
      H. Hirayama and M. Jo
    • Organizer
      The 7th International Symposium on Growth of III-Nitrides (ISGN-7)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent Progress of high-efficiency AlGaN Deep-UV LEDs2018

    • Author(s)
      H. Hirayama, M. Jo, N. Maeda, and N. Kamata
    • Organizer
      16th Symposium on the Science and Technology of Lighting (LS-16)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] THz-QCLs toward high output power near liquid nitrogen temperature operation2018

    • Author(s)
      T. T. Lin and H. Hirayama
    • Organizer
      CIMTEC 2018-8th Forum on New Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent Progress of AlGaN UVC LEDs2018

    • Author(s)
      H. Hirayama
    • Organizer
      19th International Conference on Metalorganic Vapor Phase Epitaxy (ICMOVPE-XIX)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress of high power THz QCLs2018

    • Author(s)
      T. T. Lin and H. Hirayama
    • Organizer
      Nanotech Malaysia 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress and future prospects of AlGaN deep-UV LEDs2018

    • Author(s)
      H. Hirayama and M. Jo
    • Organizer
      The International Conference and Exhibition on UV LED Technologies & Applications (ICULTA)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Optical characterization of defect levels in AlGaN multiple quantum wells by using below-gap excitation light2018

    • Author(s)
      N. Kamata, Y. Itokazu, Md H. Ismail, and H. Hirayama
    • Organizer
      The 2018 Int. Symp. for Advanced Materials Research (ISAMR 2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] AlGaN深紫外LEDの最近の進展2018

    • Author(s)
      平山秀樹
    • Organizer
      第150回記念微小光学研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 殺菌用紫外LEDの開発と今後の展望2018

    • Author(s)
      平山秀樹
    • Organizer
      光とレーザーの科学技術フェア2018紫外線セミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] AlGaN深紫外LEDの進展と今後の展望2018

    • Author(s)
      平山秀樹
    • Organizer
      第18回高機能膜フォーラム
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 深紫外LEDの基礎・課題と将来展望2018

    • Author(s)
      平山秀樹
    • Organizer
      日本学術振興会第162委員会第110回研究会特別公開シンポジウム
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] AlGaN深紫外LEDの光取り出し効率の向上2018

    • Author(s)
      平山秀樹
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] AlGaN 深紫外LED の高効率化の現状と展望2018

    • Author(s)
      平山秀樹
    • Organizer
      2018年電子情報通信学会ソサイエティ大会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] AlGaN深紫外LEDの進展と今後の展望2018

    • Author(s)
      平山秀樹
    • Organizer
      パワー光源及び応用システム研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 深紫外LEDの最近の進展と今後の展望2018

    • Author(s)
      平山秀樹
    • Organizer
      平成30年度第1回ITEC FORUM
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 深紫外LEDの進展と今後の展望2018

    • Author(s)
      平山秀樹
    • Organizer
      UV LED Forum in Japan
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 殺菌用・深紫外LEDの開発2018

    • Author(s)
      平山秀樹
    • Organizer
      JST新技術説明会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 深紫外LEDの進展と今後の展望2018

    • Author(s)
      平山秀樹
    • Organizer
      日本学術振興会結晶成長の科学と技術第161委員会第105回研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 殺菌用に実用化した深紫外LED2018

    • Author(s)
      平山秀樹
    • Organizer
      理化学研究所一般公開2018サイエンスレクチャー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 紫外線LEDの開発と今後の展望2018

    • Author(s)
      平山秀樹
    • Organizer
      赤外・紫外特別セミナー
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Efficient emission by current injection from 280 nm AlGaN deep-UV LD structures2018

    • Author(s)
      N. Maeda, M. Jo, and H. Hirayama
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Highly reflective ruthenium (Ru) p-type electrode for AlGaN deep-UV LED2018

    • Author(s)
      N. Maeda, and H. Hirayama
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Highly reflective Ni doped AlN/Al ohmic reflectors and its application to AlGaN-based flip-chip deep-UV LEDs2018

    • Author(s)
      T. H. Lee, T. H. Park, K. R. Son, H. J. Lee, S. K. Kang, H. Hirayama, and T. G. Kim
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of 240 nm-band high output power AlGaN UVC LED2018

    • Author(s)
      T. Ishiguro, R. Nakamura, S. Fujikawa, N. Maeda, R. Machida, H. Fujishiro, and H. Hirayama
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Improvement in EQE of 294 - 303 nm AlGaN UVB LED by increasing the emission efficiency from multiple quantum well (MQW)2018

    • Author(s)
      M. A. Khan, N. Maeda, Y. Yamada, and H. Hirayama
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of DC sputtered AlN template by wet KOH etching2018

    • Author(s)
      Y. Mogami, S. Motegi, A. Osawa, K. Osaki, Y. Tanioka, A. Maeoka, M. Jo, N. Maeda, H. Yaguchi, and H. Hirayama
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Controlled crystal orientations of semipolar AlN grown on m-plane sapphire by MOCVD2018

    • Author(s)
      M. Jo, Y. Itokazu, and H. Hirayama
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nonradiative recombination centers in AlGaN deep UV-LEDs detected by below-gap excitation light2018

    • Author(s)
      M. I. Hossain, Y. Itokazu, S. Kuwaba, N. Kamata, N. Maeda, and H. Hirayama
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Increasing light-extraction efficiency of AlGaN UVLED with remained low voltage by using PhC reflector on p-GaN contact layer2018

    • Author(s)
      H, Hirayama, Y. Kashima, T. Shibata, N. Maeda, M. Jo, E. Matsuura, T. Iwai, M. Kokubo, T. Tashiro, H. Furuta, R. Kamimura, Y. Osada, H. Takagi, Y. Kuwashima, Y. Iwaisako, T. Nagano
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Broadening mechanisms and self-consistent gain calculations for GaN quantum cascade laser structures2018

    • Author(s)
      K. Wang, T. T. Lin, L. Wang, J. Yun, W. Terashima, H. Hirayama, T. Grange, Z. Jehn, and S. Birnner
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Hybrid growth of AlGaN deep ultraviolet ligh emitting diodes by MBE and MOCVD2018

    • Author(s)
      K. Wang, N. Meda, and H. Hirayama
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Efficient carrier injection in UVC AlGaN LEDs with thick p-AlGaN layers2018

    • Author(s)
      S. Kuwaba, Y. Itokazu, M. Jo, N. Kamata, and H. Hirayama
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of the nucleation condetions on the quality of AlN layers with high-temperature annealing and regrowth processes2018

    • Author(s)
      Y. Itokazu, S. Kuwaba, M. Jo, N. Kamata, and H. Hirayama
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Highly-reflective photonic crystal (HR-PhC) design for increasing light- extraction efficiency (LEE) of AlGaN deep-UV LEDs2018

    • Author(s)
      J. Yun, Y. Kashima, and H. Hirayama
    • Organizer
      The International Workshop on Nitride Semiconductors 2018 (IWN2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Broadening mechanisms and simulation for GaN based THz QCLs by non-equilibrium Green’s function method2018

    • Author(s)
      K. Wang, T. Grange, T. T. Lin, L. Wang, S. Birner, J. Yun, W. Terashima and H. Hirayama
    • Organizer
      8th International Quantum Cascade Laser School and Workshop (IQCLSW2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Improving the optical gain at high temperatue in THz-QCLs by using asymmetric two-wells scheme2018

    • Author(s)
      L. Wang, T. T. Lin, K. Wang and H. Hirayama
    • Organizer
      8th International Quantum Cascade Laser School and Workshop (IQCLSW2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigation of crystallinity and current injection issue in 310 nm AlGaN UVB LED grown on AlN template in LP-MOVPE2018

    • Author(s)
      M. A. Khan, T. Matsumoto, N. Maeda, M. Jo, Y. Yamada, N. Kamata and H. Hirayama
    • Organizer
      International Symposium on Growth of III-Nitrides (ISGN-7)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evolution of morphology and crystalline quality of sputtered AlN films with high-temperature annealing2018

    • Author(s)
      Y. Mogami, S. Motegi, A. Osawa, K. Ozaki, C. Tanioka, C. Tanioka, A. Maeoka, M. Jo, N. Maeda, H. Yagichi and H. Hirayama
    • Organizer
      International Symposium on Growth of III-Nitrides (ISGN-7)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] UVC emission from (11-22) AlGaN quantum wells grown by metal-organic chemical vapor deposition2018

    • Author(s)
      M. Jo, Y. Itokazu and H. Hirayama
    • Organizer
      International Symposium on Growth of III-Nitrides (ISGN-7)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Improved crystal quality of semipolar AlN by employing thermal annealing technique with MOVPE2018

    • Author(s)
      M. Jo, S. Minami and H. Hirayama
    • Organizer
      The 19th International Conference on Metalorganic Vapor Phase Epitaxy (ICMOVPE-XIX)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of GaN-based THz-QCL structure on Si substrate grown by MOCVD2018

    • Author(s)
      S. Fujikawa, T. Ishiguro, K. Wang, W. Terashima, H. Fujishiro and H. Hirayama
    • Organizer
      The 19th International Conference on Metalorganic Vapor Phase Epitaxy (ICMOVPE-XIX)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Milliwatt power UVA LEDs developed by using AlGaN superlattice (SL) buffer layers fabricated on AlN/sapphire templates2018

    • Author(s)
      M. A. Khan, T. Matsumoto, Y. Itokazu, N. Maeda, M. Jo, N. Kamata, and H. Hirayama
    • Organizer
      The 19th International Conference on Metalorganic Vapor Phase Epitaxy (ICMOVPE-XIX)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 325nm emission from highly transparent AlGaN UVA LEDs grown on AlN template in the LP-MOCVD2018

    • Author(s)
      M. A. Khan, T. Matsumoto, Y. Itokazu, N. Maeda, M. Jo, N. Kamata and H. Hirayama
    • Organizer
      The 19th International Conference on Metalorganic Vapor Phase Epitaxy (ICMOVPE-XIX)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Narrow band milliwatts power operation of AlGaN based UVB LED for medical applications2018

    • Author(s)
      M. A. Khan, T. Matsumoto, N. Maeda, M. Jo, N. Kamata and H. Hirayama
    • Organizer
      International Conference on UV LED Technologies & Applications (ICULTA-2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of high-power THz-QCL by supressing regidual leakage current2018

    • Author(s)
      T. T. Lin, K. Wang, L. Wang, and H. Hirayama
    • Organizer
      19th East Asia Sub-millimeter-wave Receiver Technology Workshop and 5th RIKEN-NICT Joint Workshop on Terahertz Technology
    • Related Report
      2018 Annual Research Report
  • [Presentation] Recent progress towards realizing GaN/AlGaN quantum cascade lasers2018

    • Author(s)
      K. Wang, L. Wang, T. T. Lin, and H. Hirayama
    • Organizer
      電子情報通信学会レーザ・量子エレクトロニクス研究会(LQE)
    • Related Report
      2018 Annual Research Report
  • [Presentation] AlGaN深紫外LDの実現に向けた最近の進展2018

    • Author(s)
      前田哲利,山田陽一,定昌史,平山秀樹
    • Organizer
      電子情報通信学会レーザ・量子エレクトロニクス研究会(LQE)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Recent progress of high-power THz-QCLs2018

    • Author(s)
      T. T. Lin, K. Wang, L. Wang, and H. Hirayama
    • Organizer
      理研シンポジウム 第6回「光量子工学研究」
    • Related Report
      2018 Annual Research Report
  • [Presentation] GaN系QCL実現に向けたSi基板上GaN/AlGaN超格子構造の作製2018

    • Author(s)
      藤川紗千恵,石黒稔也,王科,藤代博記,平山秀樹
    • Organizer
      理研シンポジウム 第6回「光量子工学研究」
    • Related Report
      2018 Annual Research Report
  • [Presentation] Development of 304-310nm-band UVB LEDs both for medical and agricultural applications2018

    • Author(s)
      M. A. Khan, N. Maeda, Y. Yamada, and H. Hirayama
    • Organizer
      理研シンポジウム 第6回「光量子工学研究」
    • Related Report
      2018 Annual Research Report
  • [Presentation] Design of asymmetric two-wells indirect pumping terahertz quantum cascade lasers for high-temperature operation2018

    • Author(s)
      L. Wang, T. T. Lin, K. Wang, and H. Hirayama
    • Organizer
      理研シンポジウム 第6回「光量子工学研究」
    • Related Report
      2018 Annual Research Report
  • [Presentation] Approach toward GaN-based terahertz quantum-cascade laser2018

    • Author(s)
      K. Wang, T. T. Lin, L. Wang, K. Fukuda, and H. Hirayama
    • Organizer
      理研シンポジウム 第6回「光量子工学研究」
    • Related Report
      2018 Annual Research Report
  • [Presentation] UVCレーザダイオード実現へのアプローチ2018

    • Author(s)
      前田哲利,定昌史,松本卓磨,鎌田憲彦,平山秀樹
    • Organizer
      日本学術振興会162委員会第110回研究会・特別公開シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 半極性AlN/サファイアの結晶成長とUVC-LED実現へのアプローチ2018

    • Author(s)
      定昌史,糸数雄吏,桑葉俊輔,鎌田憲彦,平山秀樹
    • Organizer
      日本学術振興会162委員会第110回研究会・特別公開シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] DCスパッタ法AlNの高温アニール処理とUVC-LEDへのアプローチ2018

    • Author(s)
      茂手木省吾,最上耀介,大澤篤史,尾崎一人,谷岡千丈,前岡淳史,前田哲利,矢口裕之,平山秀樹
    • Organizer
      日本学術振興会162委員会第110回研究会・特別公開シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 高温アニール処理AlN上に作製したUVC-LEDの高効率動作2018

    • Author(s)
      糸数雄吏,桑葉俊輔,定昌史,鎌田憲彦,平山秀樹
    • Organizer
      日本学術振興会162委員会第110回研究会・特別公開シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 230-240nm短波長UVC-LEDの高出力化の検討2018

    • Author(s)
      石黒稔也,中村励志,藤川紗千恵,前田哲利,藤代博記,平山秀樹
    • Organizer
      日本学術振興会162委員会第110回研究会・特別公開シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] PhCリフレクターを用いたUVC-LEDの高効率化の進展2018

    • Author(s)
      鹿嶋行雄,渡邊康弘,柴田智彦,前田哲利,松浦恵里子,岩井武,小久保光典,田代貴晴,古田寛治,上村隆一郎,長田大和,高木秀樹,倉島優一,祝迫恭,長野丞益,平山秀樹
    • Organizer
      日本学術振興会162委員会第110回研究会・特別公開シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Progress of 310 nm-band high-efficiency UVB-LED for medical applications2018

    • Author(s)
      M. A. Khan, N. Maeda, M. Jo, Y. Yamada and H. Hirayama
    • Organizer
      日本学術振興会162委員会第110回研究会・特別公開シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Theoretical and experimental approaches for GaN/AlGaN Hz quantum cascade lasers2018

    • Author(s)
      K. Wang, L. Wang, T. T. Lin and H. Hirayama
    • Organizer
      日本学術振興会162委員会第110回研究会・特別公開シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Over 20 mW operation of 303 nm AlGaN UVB LED with p-AlGaN transparent contact layer2018

    • Author(s)
      M. A. Khan,前田哲利,定昌史,平山秀樹
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] DCスパッタAlN膜の高温アニールによる表面状態の変化2018

    • Author(s)
      茂手木省吾,最上耀介,大澤篤史,尾崎一人,谷岡千丈,前岡淳史,定昌史,前田哲利,矢口裕之,平山秀樹
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 高温アニール処理DCスパッタAlNテンプレートの評価2018

    • Author(s)
      最上耀介,茂手木省吾,大澤篤史,尾崎一人,谷岡千丈,前岡淳史,定昌史,前田哲利,矢口裕之,平山秀樹
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] AlGaN深紫外LEDのp型高反射Ru電極の検討2018

    • Author(s)
      前田哲利,平山秀樹
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] p型ドット電極とリフレクターによるAlGaN深紫外LEDの高効率動作2018

    • Author(s)
      前田哲利,J. Yun,平山秀樹
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 280nm帯AlGaN深紫外LD構造の作製とその電流注入発光特性2018

    • Author(s)
      前田哲利,定昌史,平山秀樹
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 240nm帯AlGaN UVC-LEDの高出力化の検討2018

    • Author(s)
      石黒稔也,中村励志,藤川紗千恵,前田哲利,町田龍人,藤代博記,平山秀樹
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Increased output power of THz-QCLs by reducing leakage current via upper levels2018

    • Author(s)
      T. T. Lin, K. Wang, L. Wang and H. Hirayama
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] m面サファイア上に成長した(11-12)面AlGaN量子井戸の発光特性2018

    • Author(s)
      定昌史,糸数雄吏,平山秀樹
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 高温アニール・再成長により作製したAlNの結晶性に及ぼす核形成条件の影響2018

    • Author(s)
      糸数雄吏,桑葉俊輔,定昌史,鎌田憲彦,平山秀樹
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 深紫外AlGaN発光ダイオード特性のp-AlGaN膜厚依存性2018

    • Author(s)
      桑葉俊輔,糸数雄吏,定昌史,鎌田憲彦,平山秀樹
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Reflectance of reflective photonic crystal on p-contact layer of AlGaN deep-UV LED2018

    • Author(s)
      J. Yun,鹿島行雄,平山秀樹
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] AlNの選択横方向成長におけるストライプ方位依存性2018

    • Author(s)
      金輝俊,斉藤貴大,藤川紗千恵,前田哲利,岡田成仁,平山秀樹,只友一行
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Current leakage suppression in two-well structural THz-QCLs by using asymmetric design2018

    • Author(s)
      L. Wang, T. T. Lin, K. Wang and H. Hirayama
    • Organizer
      第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Recent progress of high output power THz quantum cascade lasers2018

    • Author(s)
      T. T. Lin, K. Wang, L. Wang and H. Hirayama
    • Organizer
      電子情報通信学会レーザ・量子エレクトロニクス研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 特異構造の特性を生かした新機能発光デバイスの研究2018

    • Author(s)
      平山秀樹
    • Organizer
      新学術領域研究平成30年度領域全体会議
    • Related Report
      2018 Annual Research Report
  • [Presentation] ノーベル賞受賞中村先生のご紹介、青色発光半導体開発のインパクト2018

    • Author(s)
      平山秀樹
    • Organizer
      サイエンスシンポジウム
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] AlGaN深紫外LEDの進展と今後の展望2018

    • Author(s)
      平山秀樹
    • Organizer
      LED総合フォーラム2018 in 徳島
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 高効率・深紫外線LEDの普及に向けて2018

    • Author(s)
      平山秀樹
    • Organizer
      先端的低炭素化技術開発(ALCA)、新技術説明会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] AlGaN深紫外LEDの高効率化技術2018

    • Author(s)
      平山秀樹
    • Organizer
      サイエンス&テクノロジー社セミナー
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 殺菌用・深紫外LEDの進展2018

    • Author(s)
      平山秀樹
    • Organizer
      第32回JFCAテクノフェスタ
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Characterization of AIGaN based lower bound (280-300nm) UVB LED device grown by MOCVD2018

    • Author(s)
      M. A. Khan, Y. Itokazu, T. Matsumoto, S. Minami, N. Maeda, M. Jo, N. Kamata and H. Hirayama
    • Organizer
      11th International Conference on Plasma-Nano Technology & Science (ISPlasma2018/IC-PLANTS2018)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 深紫外線LEDの開発2017

    • Author(s)
      平山秀樹
    • Organizer
      第4回皮膚光線治療推進の会セミナー
    • Place of Presentation
      御茶ノ水ソラシティカンファレンスセンター(東京都千代田区)
    • Year and Date
      2017-03-19
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] AlGaN系深紫外LED、LD開発の最近の動向、-国際会議報告などから2017

    • Author(s)
      平山秀樹
    • Organizer
      日本学術振興会第162委員会、第102回研究会
    • Place of Presentation
      上智大学(東京都千代田区)
    • Year and Date
      2017-03-02
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] 高出力THz-QCLの進展2017

    • Author(s)
      林宗澤,寺嶋亘,平山秀樹
    • Organizer
      第3回理研-NICT合同テラヘルツワークショップ/第17回ミリ波サブミリ波受信機ワークショップ
    • Place of Presentation
      情報通信研究機構
    • Year and Date
      2017-02-27
    • Related Report
      2016 Annual Research Report
  • [Presentation] Current status and next challenges for GaN-based QCLs2017

    • Author(s)
      Ke Wang, W. Terashima, T. T. Lin and H. Hirayama
    • Organizer
      第3回理研-NICT合同テラヘルツワークショップ/第17回ミリ波サブミリ波受信機ワークショップ
    • Place of Presentation
      情報通信研究機構(東京都小金井市)
    • Year and Date
      2017-02-27
    • Related Report
      2016 Annual Research Report
  • [Presentation] テラヘルツ量子カスケードレーザの進展と展望2017

    • Author(s)
      平山秀樹
    • Organizer
      レーザー学会
    • Place of Presentation
      徳島大学(徳島県徳島市)
    • Year and Date
      2017-01-07
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] Recent progress and future prospects of THz quantum cascade lasers2017

    • Author(s)
      T. T. Lin
    • Organizer
      National Chiao Tung University Seminar
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Recent progress of AlGaN-based deep-ultraviolet light-emitting diodes2017

    • Author(s)
      M. Jo and H. Hirayama
    • Organizer
      8th International conference and Exhibition on LASERS, OPTICS & PHOTONICS
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress and future prospect of AlGaN deep-UV LEDs2017

    • Author(s)
      H. Hirayama (Tutrial Talk)
    • Organizer
      International Workshop on UV Materials and Devices 2017 (IWUMD2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress of high-efficiency AlGaN deep-UV LEDs2017

    • Author(s)
      H. Hirayama
    • Organizer
      International Foulum on Widegap Semiconductors 2017 (IFWS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress of AlGaN-based deep-UV LEDs2017

    • Author(s)
      H. Hirayama (Plenary Talk)
    • Organizer
      The 11th International Symposium on Semiconductor Light Emitting Devices (ISSLED 2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent Progress of AlGaN-based Deep-UV LEDs2017

    • Author(s)
      H. Hirayama (Plenary Talk)
    • Organizer
      8th Asian Pacific Workshop on Nitride Semiconductors (APWS 2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Current status and future of III-nitride ultraviolet and THz emitters2017

    • Author(s)
      H. Hirayama, M. Jo, W. Terashima, N. Maeda, T. T. Lin, and K. Wang
    • Organizer
      2017 International Conference on Solid State Devices and Materials (SSDM 2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent Progress of High-Efficiency AlGaN Deep-UV LED2017

    • Author(s)
      H. Hirayama, Y. Kashima, E. Matsuura, H. Takagi, N. Maeda, M. Jo, T. Iwai, M. Kokubo, T. Tashiro, R. Kamimura and Y. Osada
    • Organizer
      Europien Material Research Society (E-MRS) Fall Meeting 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Over 10% EQE AlGaN Deep-UV LED developed by using Transparent p-AlGaN contact layer2017

    • Author(s)
      H. Hirayama
    • Organizer
      2017 German-Japanese-Spanish Joint Workshop on Frontier Photonic and Electronic Materials and Devices (GJS 2017)
    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Over 10 % EQE AlGaN Deep-UV LED developed by using Transparent p-AlGaN Contact Layer2017

    • Author(s)
      H. Hirayama, T. Takano, Jun. Sakai, T. Mino, K. Tsubaki, N. Maeda, M. Jo, I. Ohshima, T. Matsumoto and N. Kamata
    • Organizer
      SPIE Photonic West, Gallium Nitride Materials and Devices XII (OE107)
    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 深紫外LED高効率化の進展と展望2017

    • Author(s)
      平山秀樹
    • Organizer
      光とレーザーの科学技術フェア2017
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 深紫外LEDの高効率光取り出し技術2017

    • Author(s)
      鹿嶋行雄、平山秀樹
    • Organizer
      光とレーザーの科学技術フェア2017
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] AlGaN深紫外LEDの最近の進展と展望2017

    • Author(s)
      平山秀樹
    • Organizer
      第3回JLEDSセミナー
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 透明コンタクト層とレンズを用いたAlGaN深紫外LEDのWPE9.6%動作2017

    • Author(s)
      平山秀樹,鹿嶋行雄,松浦恵里子,高木秀樹,前田哲利,定昌史,岩井武,森田敏郎,小久保光典,田代貴晴,上村隆一郎,長田大和
    • Organizer
      第78回応用物理学会秋季学術講演会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] AlGaN系深紫外LEDの最近の進展と展望2017

    • Author(s)
      平山秀樹
    • Organizer
      ナノ茶論
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 殺菌・医療を目指した紫外線LEDの開発2017

    • Author(s)
      平山秀樹
    • Organizer
      第39回日本光医学・光生物学会研究会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 紫外線LEDの開発と今後の展望2017

    • Author(s)
      平山秀樹
    • Organizer
      オプトロニクス社 赤外・紫外特別セミナー
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Improving EQE (10%) of AlGaN deep-UV LED using highly-reflective photonic ceystal (HR-PhC) on p-contact layer2017

    • Author(s)
      Y. Kashima, N. Maeda, E. Matsuura, M. Jo, T. Iwai, T. Morita, M. Kokubo, T. Tashiro, R. Kamimura, Y. Osada, H. Takagi and H. Hirayama
    • Organizer
      The International Workshop on UV Materials and Devices (IWUMD-2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design of THz QCLs toward high output power by variable height active structure near liquid nitrogen temperature operation2017

    • Author(s)
      T. T. Lin and H. Hirayama
    • Organizer
      The 7th Annual World Congress of Nano Science and Technology-2017 (Nano S&T-2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Waveguide design for GaN/AlGaN terahertz quantum cascade lasers2017

    • Author(s)
      K. Wang, T. T. Lin, W. Terashima and H. Hirayama
    • Organizer
      The 8th Asia-Pacific Workshop on Widegap Semiconductors (APWS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design THz quantum cascade lasers toward high output power near liquid nitrogen temperature operation2017

    • Author(s)
      T. T. Lin and H. Hirayama
    • Organizer
      2017 International Conference on Solid State Devices and Materials (SSDM 2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] EQE enhancement dependency on reflective p-type electrode of Ni/Mg and Rh in AlGaN UVC LED with transparent p-AlGaN contact layer2017

    • Author(s)
      N. Maeda, J. Yun, M. Jo and H. Hirayama
    • Organizer
      2017 International Conference on Solid State Devices and Materials (SSDM 2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Waveguide design for GaN/AlGaN terahertz quantum cascade lasers2017

    • Author(s)
      K. Wang, T. T. Lin, W. Terashima and H. Hirayama
    • Organizer
      14th International Conference on Intersubband Transitions in Quantum Wells (ITQW2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] THz quantum cascade lasers toward high output power near liquid nitrogen temperature operation2017

    • Author(s)
      T. T. Lin and H. Hirayama
    • Organizer
      14th International Conference on Intersubband Transitions in Quantum Wells (ITQW2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] THz quantum cascade lasers toward high output power near liquid nitrogen temperature operation2017

    • Author(s)
      T. T. Lin and H. Hirayama
    • Organizer
      The 24th Congress of the International Commission for Optics (ICO-24)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effects of Ga supply on the growth of (11-22) AlN on m-plane (1-100) Sapphire substrates2017

    • Author(s)
      M. Jo and H. Hirayama
    • Organizer
      12th International Conference on Nitride Semiconductors (ICNS12)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Achievement of extremely high WPE (9.6%) of AlGaN deep-UV LED by using transparent contact layer, reflective electrode and lens2017

    • Author(s)
      H. Hirayama, T. Shibata, Y. Kashima, E. Matsuura, H. Takagi, N. Maeda, M. Jo, T. Iwai, T. Morita, M. Kokubo, T. Tashiro, R. Kamimura and Y. Osada
    • Organizer
      12th International Conference on Nitride Semiconductors (ICNS12)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Achievement of high-EQE (9.5%) AlGaN deep-UV LED using highly-reflective photonic crystal (HR-PhC) on p-contact layer2017

    • Author(s)
      Y. Kashima, N. Maeda, E. Matsuura, M. Jo, T. Iwai, T. Morita, M. Kokubo, T. Tashiro, R. Kamimura, Y. Osada, H. Takagi and H. Hirayama
    • Organizer
      12th International Conference on Nitride Semiconductors (ICNS12)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Efficiency improvement of AlGaN UVC-LEDs using highly-reflective Ni/Al p-type electrode2017

    • Author(s)
      N. Maeda, M. Jo and H. Hirayama
    • Organizer
      The 44th International Symposium on Compound Semiconductors (ISCS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Improvement of light-extraction efficiency of AlGaN UVC-LEDs by using superlattice hole spreading layer and Al reflector2017

    • Author(s)
      N. Maeda, M. Jo and H. Hirayama
    • Organizer
      The 44th International Symposium on Compound Semiconductors (ISCS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Design of indirect injection scheme THz QCLs with high operation temperature2017

    • Author(s)
      T. T. Lin and H. Hirayama
    • Organizer
      The 44th International Symposium on Compound Semiconductors (ISCS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Variable height active structure design THz QCLs operating at 3.7 THz with the maximum operation temperature 145 K2017

    • Author(s)
      T. T. Lin and H. Hirayama
    • Organizer
      The 44th International Symposium on Compound Semiconductors (ISCS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] THz quantum cascade lasers toward high output power near liquid nitrogen temperature operation with Dewar condenser2017

    • Author(s)
      T. T. Lin and H. Hirayama
    • Organizer
      The 44th International Symposium on Compound Semiconductors (ISCS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of UVB LED for medical applications2017

    • Author(s)
      M. Ajmal Khan, Y. Itokazu, T. Matsumoto, S. Minami, N. Maeda, M. Jo, N. Kamata and H. Hirayama
    • Organizer
      理研シンポジウム 第5回「光量子工学」
    • Related Report
      2017 Annual Research Report
  • [Presentation] AlGaN高効率深紫外LEDの進展2017

    • Author(s)
      前田哲利,定昌史,鹿嶋行雄,松浦恵里子,高木秀樹,岩井武,森田敏郎,小久保光典,田代貴晴,上村隆一郎,長田大和,平山秀樹
    • Organizer
      理研シンポジウム 第5回「光量子工学」
    • Related Report
      2017 Annual Research Report
  • [Presentation] m面サファイア上半極性のアニールによる高品質化2017

    • Author(s)
      定昌史,南聡史,平山秀樹
    • Organizer
      電子情報通信学会レーザ・量子エレクトロニクス研究会
    • Related Report
      2017 Annual Research Report
  • [Presentation] フォトニック結晶深紫外LEDの実現~p型コンタクト層における高反射フォトニクス結晶によるAlGaN深紫外LEDの外部量子効率10%動作~2017

    • Author(s)
      鹿嶋行雄,前田哲利,松浦恵理子,定昌史,岩井武,森田敏郎,小久保光典,田代貴晴,上村隆一郎,長田大和,倉島優一,高木秀樹,平山秀樹
    • Organizer
      電子情報通信学会レーザ・量子エレクトロニクス研究会
    • Related Report
      2017 Annual Research Report
  • [Presentation] m面サファイア基板上半極性AlNの面方位制御とX線回折評価2017

    • Author(s)
      定昌史,南聡史,平山秀樹
    • Organizer
      第78回応用物理学会秋季学術講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Si基板上へのGaN系THz-QCL構造のMOCVD成長と評価2017

    • Author(s)
      石黒稔也,藤川紗千恵,王科,前田哲利,町田龍人,藤代博記,平山秀樹
    • Organizer
      第78回応用物理学会秋季学術講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 高反射Ni/Au電極のNi膜厚最適化によるAlGaN深紫外LEDの外部量子効率9%動作2017

    • Author(s)
      前田哲利,定昌史,鹿嶋行雄,松浦恵里子,高木秀樹,岩井武,森田敏郎,小久保光典,田代貴晴,上村隆一郎,長田大和,平山秀樹
    • Organizer
      第78回応用物理学会秋季学術講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 高反射フォトニック結晶によるAlGaN深紫外LEDの外部量子効率10%動作2017

    • Author(s)
      鹿嶋行雄,前田哲利,松浦恵里子,定昌史,岩井武,森田敏郎,小久保光典,田代貴晴,上村隆一郎,長田大和,高木秀樹,平山秀樹
    • Organizer
      第78回応用物理学会秋季学術講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] AlGaN深紫外LED高反射フォトニック結晶のダメージレス精密加工2017

    • Author(s)
      鹿嶋行雄,田代貴晴,小久保光典,上村隆一郎,長田大和,岩井武,森田敏郎,松浦恵里子,前田哲利,定昌史,高木秀樹,平山秀樹
    • Organizer
      第78回応用物理学会秋季学術講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Exceeding 30% IQE of AlGaN quantum well 304 nm UVB emission and single peak operation of 326nm UV LED2017

    • Author(s)
      M. A. Khan, Y. Itokazu, T. Matsumoto, N. Maeda, M. Jo, H. Hirayama and N. Kamata
    • Organizer
      第78回応用物理学会秋季学術講演会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 紫外透明p型AlGaNコンタクト層を用いた高効率深紫外LEDの開発2016

    • Author(s)
      美濃卓哉,平山秀樹,高野隆好,後藤浩嗣,植田充彦,椿健治
    • Organizer
      電子情報通信学会 レーザエレクトロニクス研究会
    • Place of Presentation
      京都大学桂キャンパス(京都府京都市)
    • Year and Date
      2016-12-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] m面サファイア基板上半導性AlGaN/AlNの結晶成長と量子井戸発光特性2016

    • Author(s)
      大島一晟,定昌史,前田哲利,鎌田憲彦,平山秀樹
    • Organizer
      電子情報通信学会 レーザエレクトロニクス研究会
    • Place of Presentation
      京都大学桂キャンパス(京都府京都市)
    • Year and Date
      2016-12-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] Future of III-Nitrides-Efficient UVC Emitter and Terahertz QCLs2016

    • Author(s)
      H. Hirayama
    • Organizer
      Phtonics Conferense 2016
    • Place of Presentation
      Phoenix Park, Korea.
    • Year and Date
      2016-11-30
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 光取出し効率の向上による高出力UVCLEDの実現2016

    • Author(s)
      平山秀樹
    • Organizer
      光とレーザーの科学技術フェア2016、紫外線セミナー
    • Place of Presentation
      科学技術館( 東京都千代田区)
    • Year and Date
      2016-11-16
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] 半導体発光デバイス未踏領域の進展と展望2016

    • Author(s)
      平山秀樹
    • Organizer
      理研・分子研合同研究会 第13回エクストリーム・フォトニクス
    • Place of Presentation
      ホテル竹島(愛知県蒲郡市)
    • Year and Date
      2016-11-14
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] 高出力THz QCLの最近の進展2016

    • Author(s)
      林宗澤,寺嶋亘,平山秀樹
    • Organizer
      第13回エクストリームフォトニクス研究会
    • Place of Presentation
      ホテル竹島(愛知県蒲郡市)
    • Year and Date
      2016-11-14
    • Related Report
      2016 Annual Research Report
  • [Presentation] AlGaN系深紫外LD実現へ向けた試み2016

    • Author(s)
      松本卓磨, 大島一晟, 前田哲利, 定昌史, 鎌田憲彦, 平山秀樹
    • Organizer
      第5回結晶工学未来塾
    • Place of Presentation
      東京農工大学(東京都府中市)
    • Year and Date
      2016-11-07
    • Related Report
      2016 Annual Research Report
  • [Presentation] 半極性結晶を用いたUVC-LEDへの進展2016

    • Author(s)
      大島一晟,定昌史,前田哲利,鎌田憲彦,平山秀樹
    • Organizer
      第5回結晶工学未来塾
    • Place of Presentation
      東京農工大学(東京都府中市)
    • Year and Date
      2016-11-07
    • Related Report
      2016 Annual Research Report
  • [Presentation] Recent progress of GaN-based terahertz quantum cascade lasers2016

    • Author(s)
      W. Terashima, T. T. Lin and Hideki Hirayama
    • Organizer
      5th Russia-Japan-USA-Europe Symposium on Fundamental & Applied Problems of Terahertz Devices & Technologies (RJUSE TeraTech-2016)
    • Place of Presentation
      東北大学(宮城県仙台市)
    • Year and Date
      2016-11-02
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 高出力(250mW)THz量子カスケードレーザーの進展2016

    • Author(s)
      林宗澤,平山 秀樹
    • Organizer
      第4回「光量子工学研究 - 若手・中堅研究者から見た光量子工学の展開 -」
    • Place of Presentation
      理化学研究所(埼玉県和光市)
    • Year and Date
      2016-11-01
    • Related Report
      2016 Annual Research Report
  • [Presentation] 光取出し効率改善による高効率(>10%)深紫外LEDの実現2016

    • Author(s)
      前田哲利,定昌史,高野隆好,阪井淳,美濃卓哉,椿健治,大島一晟,松本卓磨,鎌田憲彦,鹿島行雄,松浦恵理子,平山秀樹
    • Organizer
      第4回「光量子工学研究 - 若手・中堅研究者から見た光量子工学の展開 -」
    • Place of Presentation
      理化学研究所(埼玉県和光市
    • Year and Date
      2016-11-01
    • Related Report
      2016 Annual Research Report
  • [Presentation] AlGaN系深紫外レーザーダイオード(LD)実現への進展2016

    • Author(s)
      松本卓磨, 大島一晟, 前田哲利, 定昌史, 鎌田憲彦, 平山秀樹
    • Organizer
      第4回「光量子工学研究 - 若手・中堅研究者から見た光量子工学の展開 -」
    • Place of Presentation
      理研和光地区
    • Year and Date
      2016-11-01
    • Related Report
      2016 Annual Research Report
  • [Presentation] 半極性AlN基板を用いた高効率LEDの開発2016

    • Author(s)
      大島一晟,定昌史,前田哲利,鎌田憲彦,平山秀樹
    • Organizer
      第4回「光量子工学研究 - 若手・中堅研究者から見た光量子工学の展開 -」
    • Place of Presentation
      理研和光地区
    • Year and Date
      2016-11-01
    • Related Report
      2016 Annual Research Report
  • [Presentation] Current Status and Future of III-Nitride Ultraviolet and THz Emittres2016

    • Author(s)
      H. Hirayama
    • Organizer
      International Workshop on Nitiride Semiconductors (IWN 2016)
    • Place of Presentation
      Orland, USA.
    • Year and Date
      2016-10-02
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Design of p-AlGaN layers for efficient carrier injection in DUV LEDs2016

    • Author(s)
      M. Jo and H. Hirayama
    • Organizer
      International Workshop on Nitride Semiconductors 2016 (IWN2016)
    • Place of Presentation
      Orland, USA.
    • Year and Date
      2016-10-02
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Growth of deep-UV (11-22) AlGaN quantum wells on m-plane (1-100) sapphire substrates2016

    • Author(s)
      T. Matsumoto, I. Oshima, N. Maeda, M. Jo, N. Kamata and H. Hirayama
    • Organizer
      International Workshop on Nitride Semiconductors 2016 (IWN2016)
    • Place of Presentation
      Orland, USA.
    • Year and Date
      2016-10-02
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Structural and electrical properties of semipolar (11-22) AlGaN grown on m-plane (1-100) sapphire substrates2016

    • Author(s)
      I. Oshima, T. Matsumoto, N. Maeda, M. Jo, N. Kamata and H. Hirayama
    • Organizer
      International Workshop on Nitride Semiconductors 2016 (IWN2016)
    • Place of Presentation
      Orland, USA.
    • Year and Date
      2016-10-02
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Improvement of AlN crystal quality on Si substrate for deep UV-LED Applications2016

    • Author(s)
      B. T. Tran, H. Hirayama, N. Maeda, M. Jo, D. Inoue and T. Kikitsu
    • Organizer
      International Workshop on Nitride Semiconductors 2016 (IWN2016)
    • Place of Presentation
      Orland, USA.
    • Year and Date
      2016-10-02
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] THz quantum cascade laser toward high output power near liquid nitrogen temperature operation with dewar condenser2016

    • Author(s)
      T. Lin, W. Terashima and H. Hirayama
    • Organizer
      The 41th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz2016)
    • Place of Presentation
      Copenhargen, Denmark.
    • Year and Date
      2016-09-25
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] AlGaN系深紫外LEDの進展と展望2016

    • Author(s)
      平山秀樹、高野隆好、阪井淳、美濃卓哉、椿健治、定昌史、前田哲利、大島一晟、松本卓磨、鎌田憲彦、鹿嶋行雄、松浦恵里子
    • Organizer
      電子情報通信学会
    • Place of Presentation
      北海道大学( 北海道札幌市)
    • Year and Date
      2016-09-20
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] p型AlGaNコンタクト層を用いた深紫外LEDの注入効率に関する検討2016

    • Author(s)
      定昌史、平山秀樹
    • Organizer
      第77回応用物理学会秋季学術講演会
    • Place of Presentation
      朱鷺メッセ(新潟県新潟市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] UVC-LDエピ構造への高密度電流注入の試み2016

    • Author(s)
      松本卓磨、大島一晟、前田哲利、定昌史、鎌田憲彦、平山秀樹
    • Organizer
      第77回応用物理学会秋季学術講演会
    • Place of Presentation
      朱鷺メッセ(新潟県新潟市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] Realization of Over 10 % EQE AlGaN Deep-UV LED by using Transparent p-AlGaN Contact Layer2016

    • Author(s)
      H. Hirayama, T. Takano, J. Sakai, T. Mino, K. Tsubaki, N. Maeda, M. Jo, Y. Kanazawa, I. Ohshima, T. Matsumoto, and N. Kamata
    • Organizer
      The 25th International Semiconductor Laser Conference (ISLC2016)
    • Place of Presentation
      神戸マリンパークオリエンタルホテル(兵庫県神戸市)
    • Year and Date
      2016-09-12
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Realization of Unexplored Frequancy Terahertz Quantum Cascade Lasers by using III Nitride Semiconductors2016

    • Author(s)
      W. Terashima and H. Hirayama
    • Organizer
      The 25th International Semiconductor Laser Conference (ISLC2016)
    • Place of Presentation
      神戸マリンパークオリエンタルホテル(兵庫県神戸市)
    • Year and Date
      2016-09-12
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of patterned-Si substrate on crystalline quality of AlN template2016

    • Author(s)
      B. T. Tran, H. Hirayama, N. Maeda, M. Jo, D, Inoue and T. Kikitsu
    • Organizer
      The 18th International Conference on Crystal Growth and Epitaxy (ICCGE18)
    • Place of Presentation
      名古屋国際会議場(愛知県名古屋市)
    • Year and Date
      2016-08-09
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Progress of high-power (250 mW) quantum cascade lasers2016

    • Author(s)
      Tsung-Tse Lin, Wataru Terashima and Hideki Hirayama
    • Organizer
      RAPAC2016
    • Place of Presentation
      ヒルトン東京(東京都新宿区)
    • Year and Date
      2016-08-02
    • Related Report
      2016 Annual Research Report
  • [Presentation] Approaches towards realizing Deep-UV Laser Diodes (LDs) by controlling p-AlGaN Layers2016

    • Author(s)
      T. Matsumoto, N. Maeda, M. Jo, N. Kamata and H. Hirayama
    • Organizer
      RAPAC2016
    • Place of Presentation
      ヒルトン東京(東京都新宿区)
    • Year and Date
      2016-08-02
    • Related Report
      2016 Annual Research Report
  • [Presentation] THz量子カスケードレーザの進展と展望2016

    • Author(s)
      平山秀樹
    • Organizer
      第140回微小光学研究会
    • Place of Presentation
      日本女子大学(東京都文京区)
    • Year and Date
      2016-07-19
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Book] O plus E2021

    • Author(s)
      平山秀樹
    • Publisher
      アドコム・メディア株式会社
    • Related Report
      2020 Annual Research Report
  • [Book] 月刊OPTRONICS2020

    • Author(s)
      平山秀樹
    • Publisher
      オプトロニクス社
    • Related Report
      2020 Annual Research Report
  • [Book] 特別WEBコラム2020

    • Author(s)
      永松謙太郎、安井武史、平山秀樹
    • Publisher
      応用物理学会
    • Related Report
      2020 Annual Research Report
  • [Book] Photonics Division2019

    • Author(s)
      平山秀樹
    • Total Pages
      6
    • Publisher
      応用物理学会フォトニクス分科会
    • Related Report
      2019 Annual Research Report
  • [Book] クリーンテクノロジー2019

    • Author(s)
      平山秀樹
    • Total Pages
      5
    • Publisher
      日本工業出版
    • Related Report
      2019 Annual Research Report
  • [Book] Recent Progress in AlGaN Deep-UV LEDs2018

    • Author(s)
      Hideki Hirayama
    • Publisher
      IntechOpen
    • Related Report
      2018 Annual Research Report
  • [Book] SEMICONDUCTORS AND SEMIMETALS [III-Nitride Semiconductor Optoelectronics]2017

    • Author(s)
      H. Hirayama
    • Total Pages
      474
    • Publisher
      Elsevier
    • Related Report
      2016 Annual Research Report
  • [Book] オプトロニクス2017

    • Author(s)
      美濃卓哉、高野隆好、後藤浩嗣、植田充彦、椿健治、平山秀樹
    • Total Pages
      180
    • Publisher
      オプトロニクス社
    • Related Report
      2016 Annual Research Report
  • [Book] 学術報告2016

    • Author(s)
      平山秀樹
    • Total Pages
      34
    • Publisher
      太陽紫外線防御研究委員会
    • Related Report
      2016 Annual Research Report
  • [Book] 信学技報2016

    • Author(s)
      美濃卓哉,平山秀樹、高野隆好、後藤浩嗣、植田充彦、椿健治
    • Total Pages
      111
    • Publisher
      電子情報通信学会
    • Related Report
      2016 Annual Research Report
  • [Book] 信学技報2016

    • Author(s)
      大島一晟、定昌史、前田哲利、鎌田憲彦、平山秀樹
    • Total Pages
      111
    • Publisher
      電子情報通信学会
    • Related Report
      2016 Annual Research Report
  • [Remarks] テラヘルツ量子素子研究チーム

    • URL

      http://www2.riken.jp/lab/THz-device/

    • Related Report
      2020 Annual Research Report
  • [Remarks] 平山量子光素子研究室

    • URL

      http://www2.riken.jp/lab/optodevice/index.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] 平山量子光素子研究室

    • URL

      http://www2.riken.jp/lab/optodevice/

    • Related Report
      2019 Annual Research Report
  • [Remarks]

    • URL

      http://www2.riken.jp/lab/optodevice/index.html

    • Related Report
      2018 Annual Research Report
  • [Remarks]

    • URL

      http://www2.riken.jp/lab/THz-device/

    • Related Report
      2018 Annual Research Report
  • [Remarks]

    • URL

      http://www.riken.jp/lab/optodevice/index.html

    • Related Report
      2017 Annual Research Report
  • [Patent(Industrial Property Rights)] 量子カスケードレーザー素子2020

    • Inventor(s)
      平山秀樹,王利
    • Industrial Property Rights Holder
      理化学研究所
    • Industrial Property Rights Type
      特許
    • Filing Date
      2020
    • Related Report
      2020 Annual Research Report
  • [Patent(Industrial Property Rights)] Quantum cascade laser element2020

    • Inventor(s)
      王利,林宗澤,王科,平山秀樹
    • Industrial Property Rights Holder
      RIKEN
    • Industrial Property Rights Type
      特許
    • Filing Date
      2020
    • Related Report
      2020 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] AlNバッファー層を備えるテンプレート基板および窒化物半導体素子ならびにそれらの製造方法2019

    • Inventor(s)
      平山秀樹,定昌史,前田哲利,大澤篤史,前岡淳史
    • Industrial Property Rights Holder
      理化学研究所,株式会社SCREENホールディングス
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Annual Research Report
  • [Patent(Industrial Property Rights)] 低転位AlNの製造方法及びそれに用いる種基板2019

    • Inventor(s)
      平山秀樹,岡田成仁,只友一行
    • Industrial Property Rights Holder
      理化学研究所,山口大学
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Annual Research Report
  • [Patent(Industrial Property Rights)] 深紫外LED装置及びその製造方法2019

    • Inventor(s)
      平山秀樹,前田哲利,鹿嶋行雄(他
    • Industrial Property Rights Holder
      理化学研究所,丸文(他
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] 深紫外LED装置及びその製造方法2019

    • Inventor(s)
      平山秀樹,前田哲利,鹿嶋行雄(他
    • Industrial Property Rights Holder
      理化学研究所,丸文(他
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] 深紫外LED装置及びその製造方法2019

    • Inventor(s)
      平山秀樹,前田哲利,鹿嶋行雄(他
    • Industrial Property Rights Holder
      理化学研究所,丸文(他
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] 深紫外LED装置及びその製造方法2019

    • Inventor(s)
      平山秀樹,前田哲利,鹿嶋行雄(他
    • Industrial Property Rights Holder
      理化学研究所,丸文(他
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] 量子カスケードレーザー素子2018

    • Inventor(s)
      王利,林宗澤,平山秀樹
    • Industrial Property Rights Holder
      王利,林宗澤,平山秀樹
    • Industrial Property Rights Type
      特許
    • Filing Date
      2018
    • Related Report
      2017 Annual Research Report

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Published: 2016-07-04   Modified: 2022-01-27  

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